Accused killer mingled with partygoers: Calgary cops

Kevin Brookwell, Calgary Police Service, during an update to the media on the homicide investigation on into the city's worst mass murder on Thursday April 17, 2014, Calgary, Alta. Al Charest/Calgary Sun/QMI Agency

The five were among a group celebrating the end of the school year at the University of Calgary, where three of them attended, at a low-key house party on Butler Cres. N.W.

Two young female adults, who declined to be identified or talk to media show emotion as they visit the scene of Calgary's largest mass murder scene on Butler Cr NW in Calgary, Alta Wednesday April 16, 2014. (Jim Wells/QMI Agency)